Search for dissertations about: "NPQ"

Showing result 1 - 5 of 7 swedish dissertations containing the word NPQ.

  2. 1. Stress responses of Arabidopsis plants with a varying level of non-photochemical quenching

    Author : Hanna Johansson Jänkänpää; Stefan Jansson; Barbara Demmig-Adams; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis; NPQ; PsbS; photosynthesis; field experiment; metabolomics; Physiological Botany; fysiologisk botanik; molekylärbiologi; Molecular Biology;

    Abstract : When light energy input exceeds the capacity for photosynthesis the plant need to dissipate the excess energy and this is done through non-photo-chemical quenching (NPQ). Photochemical quenching (photosynthesis), NPQ and fluorescence are three alternative faiths of excited chlorophylls. PsbS associates to photosystem II and is involved in NPQ. READ MORE

  4. 2. Dissecting the photosystem II light-harvesting antenna

    Author : Jenny Andersson; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Plant physiology; antisense; Arabidopsis thaliana; chlorophyll; carotenoid; feedback de-excitation; fitness; LHC; NPQ; photosynthesis; state transitions; xanthophyll; Växtfysiologi; Plant physiology; Växtfysiologi; Physiological Botany; fysiologisk botanik;

    Abstract : In photosynthesis, sunlight is converted into chemical energy that is stored mainly as carbohydrates and supplies basically all life on Earth with energy.In order to efficiently absorb the light energy, plants have developed the outer light harvesting antenna, which is composed of ten different protein subunits (LHC) that bind chlorophyll a and b as well as different carotenoids. READ MORE

  5. 3. Investigating the molecular mechanism of photoprotection, qH, in Arabidopsis thaliana

    Author : Pierrick Bru; Alizée Malnoë; Stefano Caffarri; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photosynthesis; Photoprotection; non photochemical quenching; qH; genetic screen; genome editing; biology; biologi; Biochemistry; biokemi; molekylärbiologi; Molecular Biology;

    Abstract : Photoprotection mechanisms in plants play a crucial role in maintaining photosystem integrity and preventing photooxidative damage. In this study, we aimed to identify new molecular players involved in the qH process, a sustained photoprotective mechanism. READ MORE

  6. 4. Phosphorylation in State Transition : Less cause more effect

    Author : Jakob Damkjaer; Jansson Stefan; Eva-Mari Aro; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Photosynthesis; Photoacclimation; State Transtion; LHCII Phosphorylation; Lhcb3; Lhcb6; Plant physiology; Växtfysiologi; molekylärbiologi; Molecular Biology;

    Abstract : Study of the Arabidopsis thaliana knockout mutant lacking Lhcb3 (koLhcb3) have revealed a close similarity to the wild type plants. Growth rate, NPQ, qP, Φ(PSII), circular dichroism spectra, pigment composition and content of LCHII trimers have been found to be unaffected by this mutation. READ MORE

  7. 5. Characterization of ion transport proteins involved in chloroplast function from land plants and algae

    Author : Emilija Dukic Marinkov; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Evolved around 2.4 billion years ago and even earlier, according to the new geochemical evidence, oxygenic photosynthesis is the crucial turning point in the history of our planet. READ MORE